For over 20 years the libraries’ ecological activities has been discussed within the framework of the specialized section “Ecological information and ecological culture” at “Crimea” World Forum. In 2018, the section was transformed into the conference on the current problems of ecological education. Since 2024 it is called “The green libraries – the libraries of the future”. Since 2020, the biennial online conference “Libraries and ecological education: Theory and practice” is held under the aegis of the Forum. The online conference is to engage more library specialists into ecological education. In 2024, the international online conference was held for the third time. The author reviews the conference professional events and summarizes in brief the papers presented at the conference, and discusses the participants’ practical experience and methodological solutions for ecological education and promotion of Sustainable Development Goals (SDGs).